CN103513502A - Light source apparatus - Google Patents

Light source apparatus Download PDF

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Publication number
CN103513502A
CN103513502A CN201310232428.4A CN201310232428A CN103513502A CN 103513502 A CN103513502 A CN 103513502A CN 201310232428 A CN201310232428 A CN 201310232428A CN 103513502 A CN103513502 A CN 103513502A
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CN
China
Prior art keywords
temperature
light source
source component
light
cooling body
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Granted
Application number
CN201310232428.4A
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Chinese (zh)
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CN103513502B (en
Inventor
熊野宏治
栗秋诚
贵岛拓己
田中靖人
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/56—Cooling arrangements using liquid coolants
    • F21V29/57—Cooling arrangements using liquid coolants characterised by control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0457—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • F21V29/52—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes electrically powered, e.g. refrigeration systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/54—Cooling arrangements using thermoelectric means, e.g. Peltier elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/3144—Cooling systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/18—Controlling the intensity of the light using temperature feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)

Abstract

The present invention provides a light source apparatus capable of maintaining an element temperature of a light source element to be constant. As a solution, the light source apparatus (100) includes a cooling mechanism driving portion (3) for driving a cooling mechanism (5) in such a manner that the element temperature of the light source element (4) which is detected by an element temperature detecting portion (8) reaches a target temperature, and a control portion (1) for calculating a dew point temperature of the cooling mechanism (5) and controlling the cooling mechanism driving portion (3) and a light source element driving portion (2) by using the calculated dew point temperature and the element temperature.

Description

Light supply apparatus
Technical field
The present invention relates to have the light supply apparatus of the structure that the temperature of light source component is controlled.
Background technology
In recent years, in such as light supply apparatuses such as projector, long lifetime based on light source component, the requirement of high output, LED(Light Emitting Diode: light emitting diode) element and laser diode (semiconductor Laser device) etc. are used to substitute existing lamp source.In the following description, each LED element and laser diode are also known as light source component.
Light source component has the higher output of temperature and the characteristic that more declines of life-span.Therefore,, in order to maintain high life and the high output of light source component, need to make the temperature of this light source component keep lowlyer.In addition, as the cooling way of light source component, use peltier-element and water-cooled cooling body etc.In the following description, the temperature of light source component is also known as component temperature.
In addition, light source component is in the situation that component temperature changes, and the wavelength of the light of this light source component output can change.In the situation that light source component is applied to the so-called image documentation equipments such as projector, the wavelength variations of light source component can produce the variation of form and aspect.Therefore, need to make component temperature keep constant as far as possible.
As cooling way, in thering is the cooling device of refrigeration machine etc., the temperature of the cooling surface of light source component is likely lower than the dewpoint temperature being determined by surrounding environment, and wherein, described refrigeration machine has so-called peltier-element, handpiece Water Chilling Units (chiller), compressor etc.Surrounding environment refers to environment temperature, ambient humidity, light and temperature etc.In addition, dewpoint temperature refers to the temperature that starts dewfall.Now, the water droplet producing due to dewfall may cause breaking down with the circumferential component headed by light source component, electric circuit system.
Therefore, in patent documentation 1, disclose the technology (being also known as below prior art A) for tackling the dewfall countermeasure of surrounding environment change.In prior art A, utilize the air borne sensor being arranged in device to come testing environment temperature, ambient humidity, according to them, infer Saturated water vapor pressure.And then, when the water vapor pressure of extraneous air surpasses Saturated water vapor pressure, stop the control of peltier-element, Antidewing.
Patent documentation 1: No. 3315461 communique of Japanese Patent (paragraph 0025～0029, Fig. 4)
But prior art A has following problem.In prior art A, the moment that stops the control of peltier-element (cooling body) is the moment that the water vapor pressure of extraneous air surpasses Saturated water vapor pressure, at this constantly, may produce dewfall.
In addition, there are the following problems for prior art A: owing to stopping the control of peltier-element, therefore, because the temperature after stopping rises, it is constant that the component temperature of light source component can not keep, and wavelength changes and produces form and aspect deviation.In addition, under the state of control that stops peltier-element, the component temperature of light source component rises, thereby may cause life-span of element to be worsened or the problem such as component wear.That is,, in prior art A, exist and in order to prevent the problems referred to above, can not make component temperature keep constant such problem.
Summary of the invention
The present invention is just in order to have addressed this problem, and its object is, provides a kind of component temperature of light source component that can make to keep constant light supply apparatus.
In order to achieve the above object, the light supply apparatus of a mode of the present invention has: the light source component that penetrates light; Drive the light source component drive division of described light source component; Described light source component is carried out to cooling cooling body; Component temperature test section, it detects the component temperature as the temperature of described light source component; Cooling body drive division, it drives described cooling body, makes the described component temperature being detected by described component temperature test section become target temperature; And control part, it calculates the dewpoint temperature of described cooling body, utilizes the described dewpoint temperature and the described component temperature that calculate to control described cooling body drive division and described light source component drive division.
According to the present invention, cooling body drive division drives cooling body, and making becomes target temperature as the component temperature of the temperature of light source component.Thus, can make the component temperature of light source component keep constant.Therefore, can suppress the light wavelength variation of light source component ejaculation, the form and aspect variation of this light etc.The misalignment that consequently, can suppress the light of light source component ejaculation.
Accompanying drawing explanation
Fig. 1 is the block diagram of structure that the light supply apparatus of embodiment 1 is shown.
Fig. 2 is the process flow diagram that the control carried out of light supply apparatus is processed.
Label declaration
1 control part, 2 light source component drive divisions, 3 cooling body drive divisions, 4 light source components, 5 cooling bodies, 6 mirrors, 7 heat pipes, 8 component temperature test sections, 9 light quantity test sections, 10 heating radiators, 11 fans, 12 environmental sensors, 100 light supply apparatuses.
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.In the following description, to identical textural element mark prosign.Their title and function are also identical.Therefore, omit sometimes the detailed description to them.
Below, as an example of the present invention, with reference to the accompanying drawings, to using the embodiment of the light supply apparatus of light source component to be elaborated.In addition, the invention is not restricted to this embodiment.
< embodiment 1 >
Fig. 1 is the block diagram of structure that the light supply apparatus 100 of embodiment 1 is shown.As shown in Figure 1, light supply apparatus 100 has light source component 4, mirror 6, light source component drive division 2, cooling body 5, heat pipe 7, heating radiator 10, fan 11, cooling body drive division 3, light quantity test section 9, component temperature test section 8, control part 1 and environmental sensor 12.
Light source component 4 is the elements that penetrate light.Light source component 4 is laser diode (LASER Light Source elements).In addition, light source component 4 is not limited to laser diode, for example, can be also LED element.
Light source component drive division 2 is according to the control of control part 1, drives (make its luminous) light source component 4 by apply voltage to light source component 4.Drive current flows through driven light source component 4.
The major part of the light that mirror 6 penetrates light source component 4 reflects, and is directed to the outside of light supply apparatus 100 as Output of laser.In addition a part for the light that, mirror 6 penetrates light source component 4 is directed to light quantity test section 9.Thus, light quantity test section 9 receives the light that (detection) is directly proportional to the intensity of Output of laser.
Cooling body 5 is configured to light source component 4 to carry out cooling.Cooling body 5 is for example peltier-element.Cooling body 5 is configured to and light source component 4 butts.In the following description, cooling body 5 is also known as cooling end 5a with the part of light source component 4 butts.Cooling end 5a carries out cooling part to light source component 4.That is, cooling body comprises light source component 4 is carried out to cooling cooling end 5a.Cooling end 5a and light source component butt are to produce thermal resistance.
In addition, in the situation that cooling body 5 is peltier-element, cooling body 5 and 4 butts of light source component.In this case, cooling end 5a is also known as cooling surface.
In addition, cooling body 5 is via heat pipe 7 and heating radiator 10 thermal couplings.Fan 11 produces wind, and this wind is discharged the heat of heating radiator 10 to outside.
The hot part that light source component 4 sends is delivered to heating radiator 10 via cooling body 5 and heat pipe 7.The heat that is delivered to heating radiator 10 is discharged to the outside of light supply apparatus 100 by fan 11.
Cooling body drive division 3 drives cooling body 5.Cooling by driving 5 pairs of light source components of cooling body 4 to carry out.Cooling body 5 is for example peltier-element.In this case, cooling body drive division 3 is to cooling body 5(peltier-element) apply for the voltage at cooling body 5 generation currents, drive thus cooling body 5.
Light quantity test section 9 detects the light quantity of the light that is irradiated to this light quantity test section 9, the light quantity detecting according to this, the light quantity P of the light that detection light source element 4 penetrates 0.The ratio that is irradiated to the light quantity of light of light quantity test section 9 and the light quantity of the light of light source component 4 ejaculations is the value (for example 1:9) predetermining.Therefore, light quantity test section 9 can, according to the light quantity of irradiated light, detect the light quantity P of the light of light source component 4 ejaculations 0.Light quantity test section 9 is by the light quantity P detecting 0be sent to control part 1.
Component temperature test section 8 and light source component 4 hot tie-ins.The temperature of component temperature test section 8 detection light source elements 4 (following, to be also known as component temperature Tj).Component temperature Tj is for example knot (junction) temperature.Particularly, component temperature test section 8 is the temperature of detection light source element 4 all the time, and component temperature Tj is sent to control part 1.
Control part 1 is such as being the microcontrollers such as CPU (microcomputer).Control part 1 is controlled light source component drive division 2, makes the light quantity (intensity) of Output of laser remain constant.That is, control part 1 is controlled light source component drive division 2, makes the light output of light source component 4 become desired value.Particularly, the voltage that control part 1 applies to light source component 4 to light source component drive division 2 indication light source element drives portions 2.
In addition, control part 1 is controlled cooling body drive division 3, and the component temperature Tj that makes light source component 4 is constant all the time, and details will be described later.Cooling body drive division 3 drives cooling body 5 according to the control of control part 1, makes the component temperature Tj being detected by component temperature test section 8 become predetermined target temperature.This is necessary control making the oscillation wavelength of light source component 4 or oscillation efficiency keep constant and keeping aspect life-span of light source component 4.
Environmental sensor 12 is obtained the information of the surrounding environment of light supply apparatus 100.Environmental sensor 12 comprises environment temperature test section 13 and ambient humidity, light and temperature test section 14.In addition, each environment temperature test section 13 and ambient humidity, light and temperature test section 14 also can not be included in environmental sensor 12 but arrange independently.
The environment temperature test section 13 at any time environment temperature of detection light source device 100 is environment temperature Tc(external air temperature).Environment temperature test section 13 is sent to control part 1 by environment temperature Tc at any time.The ambient humidity, light and temperature test section 14 at any time ambient humidity, light and temperature of detection light source device 100 is ambient humidity, light and temperature Hc(extraneous air relative humidity).Ambient humidity, light and temperature test section 14 is sent to control part 1 by ambient humidity, light and temperature Hc at any time.
Control part 1 utilizes environment temperature Tc and ambient humidity, light and temperature Hc, calculates cooling body 5(cooling end 5a) dewpoint temperature Tr.Described dewpoint temperature refers to that the saturation vapour pressure in surrounding environment becomes 100% and temperature while starting dewfall.As mentioned above, control part 1 is controlled cooling body drive division 3, makes the component temperature Tj constant of light source component 4.At this, establishing from light source component 4 is θ js to the thermal resistance cooling end 5a.The temperature of in addition, establishing cooling end 5a is Ts.If the voltage applying to light source component 4 is Vf.In addition the drive current of, establishing light source component 4 is Id.In addition, suppose that component temperature Tj is constant.In this case, meet following formula 1.
(Vf * Id-P 0) * θ js=Tj-Ts(formula 1)
Id is represented by the following formula 2 that formula 1 distortion is obtained.
Id={ (Tj-Ts)/θ js+P 0}/Vf(formula 2)
In addition, Vf is not limited to the actual voltage applying to light source component 4.Vf represents the Id that measures in advance and the relation of Vf by sheet form or approximate expression, the value of at every turn reading from storer.In addition, Vf for example also can be calculated by control part 1.In addition,, in the situation that the relevance between Vf and Id is little, in order to simplify, Vf also can get steady state value.
In the following description, in the situation that dewpoint temperature Tr equals the temperature T s of cooling end 5a, the drive current Id of light source component 4 corresponding to the critical temperature with starting dewfall is denoted as to maximum drive current Idmax.Idmax is represented by the following formula 3 that the Ts of formula 2 is replaced to Tr.
Idmax={ (Tj-Tr)/θ js+P 0}/Vf(formula 3)
Control part 1 calculates maximum drive current Idmax according to formula 3.And then drive current Id and the maximum drive current Idmax of 1 pair of light source component 4 of control part compare.As shown in the formula 4 such, at Id, be Idmax above in the situation that, control part 1 is controlled light source component drive division 2, makes light quantity P 0desired value (setting value) reduce.In the following description, light quantity P 0desired value be also known as light quantity desired value.
Id >=Idmax(formula 4)
Control part 1 is controlled light source component drive division 2, makes the light quantity P receiving from light quantity test section 9 0value change, make thus light quantity P 0the desired value processing that reduces or increase.That is, in order to make light quantity P 0change, control part 1 is controlled light source component drive division 2, the change in voltage that light source component drive division 2 is applied to light source component 4.That is to say, control part 1 is controlled light source component drive division 2, the up-to-date light quantity P that control part 1 is received from light quantity test section 9 0value (rreturn value) become fresh target value.
By reducing light quantity desired value, the drive current Id of light source component 4 is reduced.Control part 1 is controlled cooling body drive division 3, even if make at light quantity P 0while reducing, component temperature Tj is also as constant in above-mentioned maintenance.Thus, make component temperature Tj keep constant, make the cooling surface at cooling end 5a() can not produce dewfall.
That is, control part 1 is controlled Ts and Id by controlling cooling body drive division 3 and light source component drive division 2, makes to meet the relational expression of following formula 5 and following formula 6.Thus, can prevent the cooling surface at cooling end 5a() generation dewfall.
Tr < Ts(formula 5)
Ts=Tj-(Vf * Id-P 0) * θ js(formula 6)
Formula 6 is formulas that formula 1 distortion is obtained.
Next, the processing that the light supply apparatus 100 of embodiment 1 is carried out (following, to be also known as to control and to process) describes.Fig. 2 controls the process flow diagram of processing.
As mentioned above, the voltage that control part 1 applies to light source component 4 to light source component drive division 2 indication light source element drives portions 2.In addition, control part 1 is pre-stored has expression according to the voltage applying to light source component 4, to flow through the voltage-current characteristic of the electric current of light source component 4.Therefore, control part 1 is based on voltage-current characteristic, and the voltage applying according to light source component drive division 2 is grasped the drive current Id of light source component 4 all the time.
In step S20, carry out the detection of environment temperature and ambient humidity, light and temperature.Particularly, environment temperature test section 13 detects environment temperature Tc, and environment temperature Tc is sent to control part 1.In addition, ambient humidity, light and temperature test section 14 detects ambient humidity, light and temperature Hc(extraneous air relative humidity), and this ambient humidity, light and temperature Hc is sent to control part 1.
In step S21, control part 1 utilizes environment temperature Tc and ambient humidity, light and temperature Hc to calculate cooling body 5(cooling end 5a) dewpoint temperature Tr.The method of utilizing temperature and humidity to calculate dewpoint temperature is known technology, thereby does not repeat to describe in detail.
In step S22, control part 1, according to described formula 3, calculates maximum drive current Idmax.Maximum drive current Idmax is that the temperature of cooling end 5a does not become maximum drive current below dewpoint temperature, light source component 4.
In step S23, control part 1 judges whether drive current Id is less than maximum drive current Idmax.If be to affirm (YES), again carry out the processing of step S20 in step S23.And then, repeatedly carry out the processing of step S20～S23.On the other hand, if be negative (NO) in step S23, process and be transformed into step S24.In step S23, be that negative situation refers to the situation of drive current Id more than maximum drive current Idmax.
In step S24, control part 1 is controlled light source component drive division 2, and drive current Id is reduced.Particularly, control part 1 indication light source element drives portion 2, the voltage that light source component drive division 2 is applied to light source component 4 reduces predetermined value.Light source component drive division 2 makes the voltage applying to light source component 4 reduce predetermined value according to this indication.This predetermined value is for example 10% of the voltage that applies of light source component drive division 2.Thus, drive current Id reduces.The light quantity P of the light that consequently, light source component 4 penetrates 0reduce.Then, again carry out the processing of step S23.
In addition, control part 1 is processed and is carried out independently, concurrently following temperature control processing with control.In temperature, control in processing, as mentioned above, control part 1 is controlled cooling body drive division 3, makes component temperature Tj keep constant.That is, cooling body drive division 3 drives cooling body 5 according to the control of control part 1, makes the component temperature Tj being detected by component temperature test section 8 become predetermined target temperature.A little particularly, cooling body drive division 3 drives cooling body 5, makes component temperature Tj roughly keep target temperature.
More specifically, establish cooling body 5(cooling end 5a) dewpoint temperature be Tr, the temperature of establishing cooling end 5a is Ts, establishing the voltage applying to light source component 4 is Vf, the drive current of establishing light source component 4 is Id, the light quantity of establishing the light that light source component 4 penetrates is P 0, the component temperature of establishing light source component 4 is Tj, establishing from light source component 4 is θ js to the thermal resistance cooling end 5a.
In this case, control part 1 is controlled Ts and Id by controlling cooling body drive division 3 and light source component drive division 2, makes to meet the relational expression of formula 5 and formula 6.That is, control part 1 utilizes the up-to-date dewpoint temperature Tr and the component temperature Tj that in step S21, calculate to control cooling body drive division 3 and light source component drive division 2.In other words, control part 1 utilizes dewpoint temperature Tr and component temperature Tj to control cooling body drive division 3 and light source component drive division 2.
Thus, cooling body drive division 3 drives cooling body 5 according to the control of control part 1, makes the temperature of cooling end 5a maintain the temperature higher than the dewpoint temperature of cooling body 5.In addition, cooling body drive division 3 is controlled the voltage (input electric power) applying to light source component 4, makes the temperature of cooling end 5a be not less than dewpoint temperature.For example, cooling body drive division 3 suppresses the voltage (input electric power) applying to light source component 4.
As mentioned above, according to present embodiment, cooling body drive division 3 drives cooling body 5, makes the component temperature of light source component 4 become target temperature.A little particularly, cooling body drive division 3 drives cooling body 5, makes component temperature Tj roughly keep target temperature.Thus, can make the component temperature of light source component 4 keep constant.Therefore, can suppress the light wavelength variation of light source component 4 ejaculations, the form and aspect variation of this light etc.That is the light wavelength that, can make light source component 4 penetrate remains constant.The misalignment that consequently, can suppress the light of light source component 4 ejaculations.In addition, can prevent from worsening and damaging by rise life-span of the light source component 4 that causes of the temperature of light source component 4.
In addition, according to present embodiment, can be by suppressing to prevent to the input electric power of light source component 4 situation that the life-span of light source component 4 worsens and damages.
In addition,, according to present embodiment, cooling body drive division 3 drives cooling body 5, makes the temperature of the cooling end 5a of cooling body 5 maintain the temperature higher than dewpoint temperature.Therefore, can prevent from, in cooling body 5, dewfall occurs.Therefore, owing to not producing the water droplet being caused by dewfall, thereby can peventing member fault etc. the generation of problem.That is, can prevent the generation of the problems such as fault of the circumferential component that causes because of dewfall.
In addition, in the present embodiment, establishing cooling body 5 is peltier-element, but is not defined in this.Cooling body 5 can be also the magnetism servo-electric motor water-cooling (water-cooled cooling body) that utilizes chilled water.Magnetism servo-electric motor water-cooling is for example handpiece Water Chilling Units device (cooling body of handpiece Water Chilling Units mode).Handpiece Water Chilling Units device is controlled to carry out cooling by carrying out the temperature of chilled water.
In addition, above-mentioned magnetism servo-electric motor water-cooling for example also can consist of heat exchanger and fan.In this case, magnetism servo-electric motor water-cooling is controlled to carry out cooling by carrying out rotation speed of the fan.Even in this structure, according to present embodiment, also can prevent from, in cooling body 5, dewfall occurs.
In addition, cooling body 5 can be also to utilize fluorocarbon as mechanism's (cooling body of refrigerant) of cold-producing medium.Fluorocarbon is the cold-producing medium for refrigerator, air-conditioning etc.In this structure, cooling body 5 has condenser, compressor, expansion valve etc.It is cooling that cooling body 5 utilizes fluorocarbon to carry out.Even in this structure, according to present embodiment, also can prevent from, in cooling body 5, dewfall occurs.
In addition, in the present embodiment, show and using laser diode as light source component, carry out cooling example, still, at application LED(light emitting diode) etc. during as light source component, also can obtain identical effect.
In addition, within the scope of the invention, the present invention can suitably be out of shape, omit embodiment.
Utilizability in industry
The present invention can keep constant light supply apparatus to utilize as the component temperature that can make light source component.

Claims (7)

1. a light supply apparatus, wherein, this light supply apparatus has:
Penetrate the light source component of light;
Drive the light source component drive division of described light source component;
Described light source component is carried out to cooling cooling body;
Component temperature test section, it detects the component temperature as the temperature of described light source component;
Cooling body drive division, it drives described cooling body, makes the described component temperature being detected by described component temperature test section become target temperature; And
Control part, it calculates the dewpoint temperature of described cooling body, utilizes the described dewpoint temperature and the described component temperature that calculate to control described cooling body drive division and described light source component drive division.
2. light supply apparatus according to claim 1, wherein,
Described cooling body comprises described light source component is carried out to cooling cooling end,
Described cooling body drive division drives described cooling body according to the control of described control part, further makes the temperature of described cooling end maintain the temperature higher than described dewpoint temperature.
3. light supply apparatus according to claim 1 and 2, wherein,
Described light supply apparatus also has:
Environment temperature test section, it detects the environment temperature of described light supply apparatus; And
Ambient humidity, light and temperature test section, it detects the ambient humidity, light and temperature of described light supply apparatus,
Described control part utilizes described environment temperature and described ambient humidity, light and temperature to calculate described dewpoint temperature, utilizes described dewpoint temperature and described component temperature to control described cooling body drive division and described light source component drive division.
4. light supply apparatus according to claim 1 and 2, wherein,
Described cooling body comprises described light source component is carried out to cooling cooling end,
Described cooling end and described light source component butt to be to produce thermal resistance,
Described light source component drive division drives described light source component by applying voltage to described light source component,
Described light supply apparatus also has the light quantity test section that the light quantity of the light of described light source component ejaculation is detected,
Establishing described dewpoint temperature, be Tr, the temperature of establishing described cooling end is Ts, and establishing the voltage applying to described light source component is Vf, and the drive current of establishing described light source component is Id, and establishing described light quantity is P 0, establishing described component temperature is Tj, establish in the situation that described thermal resistance is θ js,
Described control part, by controlling described cooling body drive division and described light source component drive division is controlled Ts and Id, makes to meet following relational expression:
Tr＜Ts
Ts＝Tj-（Vf×Id-P 0）×θjs。
5. light supply apparatus according to claim 1 and 2, wherein,
Described cooling body is peltier-element.
6. light supply apparatus according to claim 1 and 2, wherein,
Described cooling body is the magnetism servo-electric motor water-cooling that utilizes chilled water.
7. light supply apparatus according to claim 1 and 2, wherein,
Described cooling body is the mechanism utilizing as the fluorocarbon of cold-producing medium.
CN201310232428.4A 2012-06-15 2013-06-13 Light supply apparatus Expired - Fee Related CN103513502B (en)

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